Revenue (Tables)

6 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Summary of Contract Asset and Liabilities

Contract assets and liabilities as of March 31, 2021 and September 30, 2020 are summarized below (in thousands):

	March 31, 2021		September 30, 2020
Contract assets	$	42,728	$	50,995
Contract liabilities	(54,098)		(79,445)
Net contract liability	$	(11,370)	$	(28,450)

Disaggregation of Revenue

The following tables present our disaggregated revenue by geographic destination and market sector for the six months ended March 31, 2021 and 2020 (in thousands):

	Three months ended March 31,				Six months ended March 31,
	2021		2020		2021		2020
United States	$	87,939	$	121,432	$	168,525	$	228,510
Canada	17,734		15,407		31,825		29,861
Europe, Middle East and Africa	10,937		8,816		19,193		18,982
Asia/Pacific	2,009		5,456		4,725		7,142
Mexico, Central and South America	97		459		1,023		1,225
Total revenues by geographic destination	$	118,716	$	151,570	$	225,291	$	285,720

	Three months ended March 31,				Six months ended March 31,
	2021		2020		2021		2020
Oil and gas	$	50,142	$	51,954	$	90,171	$	111,948
Petrochemical	10,196		47,337		19,361		77,763
Electric utility	28,452		24,255		56,622		47,270
Traction power	15,140		13,944		28,501		22,295
All others	14,786		14,080		30,636		26,444
Total revenues by market sector	$	118,716	$	151,570	$	225,291	$	285,720